Process of welding steel and copper.



UNITED STATES PATENT OFFICE.

THOMAS SMITH AND FRANK G. SHERRY, OF PITTSBURQ PENNSYLVANIA.

PROCESS OF WELDING STEEL AND COPPER.

SPECIFICATION forming part Of Letters Patent NO. 673,664, dated May 7, 1901.

Application filed September 5. 1900. Serial No 29,079. (No specimens.)

process whereby steel and. copper may be easily welded together.

With the above and other objects in view the invention consists in combining certain ingredients and subjecting the same between a steel plate and a layer of copper, and upon the upper face of the copper, whereby the two metals may be efiectually welded together when properly heated and reheated and sub:

sequently placed between rolls or under the hammer, as the case may be.

In describing the invention in detail we will first give the component parts forming the flux, which consists of borax, lime, pulverized oyster-shell, and sand.

The process of producing the desired result of welding the two metals together is as follows: A steel plate is placed in a furnace and brought to a white heat. It is then withdrawn from the furnace, and the flux, com"- posed of the above ingredients, is placed upon the surface of the steel plate. A cold sheet of copper is then placed upon the hot steel plate, and another layer of flux, composed of the above ingredients, is placed upon the copper plate, preventing the latter from fusmg nace and allowed to remain there until a welding heat is obtained, When the plates are then passed through rolls or under a hammer, as the case may be, thereby efiectually welding the steel and copper together.

It will be noted thatvarious changes may be made as to the process of welding the two metals together and that the ingredients composing the fiux may be used in the desired quantities and proportions, as we do not wish Both plates are then placed in the furto confine ourselves to the exact proportions of the different ingredients composing the flux.

Having thus fully described our process, what we claim as new, and desire to secure by Letters Patent, is

l. A process of welding steel to copper which consists in heating a steel plate to a white heat, placing a flux upon said steel plate, placing a copper plate upon the fiux and steel plate, and then heating the two plates to a welding heat and subjecting the two metals to the rolls or hammer.

2. A process of welding steel to copper which consists in heating a steel plate to a white heat, then placing a flux upon the steel plate, placing a cold copper plate upon the flux and steel plate, coating the surface of said copper plate with a flux, then heating the two plates to a welding heat, and subjecting the two metals to the hammer or rolls.

3. A process of weldin g steel to copper which then treating it with a flux composed of borax, lime, pulverized oyster-shell, and sand, placing the copper upon the coated hot steel, then coating the copper with the flux, and then heating the two metals and welding the same together.

. 4. Aprocess of welding steel 'to copper which consists in first heating the steel, applying a flux to the heated steel, placing the copper jecting the same to the pressure for welding.

5. A process of welding steel to copper which consistsin first heating the steel, second coat ing the heated steel with a flux containing bo rax, thirdplacing cold copper upon the coated steel, fourth coating the copper with the flux, fifth heating the two metals simultaneously, and finally passing the same between rolls or under a hammer for the welding, substantially as described.

6. A process of welding steel to copper which consists in first heating the steel, second applying a coating of flux containing borax and lime to the heated steel, third placing cold copper upon the coated steel, fourth coating the copper with the flux, fifth heating the two consists in heating the steel to a white heat,

upon the flux-coated steel, then heating the two metals simultaneously, and finally submetals simultaneously, and finally passing the same between rolls or under a hammer for the welding.

'7. A process of welding steel to copper which consists in first heating the steel, second applying acoating of flux containing bot-ax, lime and pulverized oyster-shell to the heated steel, third placing cold copper upon the coated steel, fourth coating the copper with the flux, fifth heating the two metals simultaneously, and finally passing the same between rolls or under ahannner for the welding.

8. A process of welding steel to cop per which consists in first heating the steel, second applyingacoatingofflux containingborax,lime, pulverized oyster-shell, and sand to the heated steel, third placing cold copper upon the coated steel, fourth coating the copper with the flux, fifth heating the two metals simultaneously, and finally passing the same between rolls or under a hammer for the welding.

9. A process of welding steel to copper which consists in first heating the steel, second applying a coating of flux containing lime to the heated steel, third placing cold copper upon the coated steel, fourth coating the copper with the flux, fifth heating the two metals simultaneously, and finally passing the same between rolls or under a ham mer for the welding.

10. A process of Welding steel to copper which consists in first heating the steel, second applying a coating of fiux containing pulverized oyster-shell to the heated steel, fourth coating the copper with the flux, fifth heating the two metals simultaneously, and finally passing the same between rolls or under a hammer for the welding.

11. A process of welding steel to copper which consists in first heating the steel, second applying a coating of flux containing sand to the heated steel, fourth coating the copper with the flux, fifth heating the two metals siin ultaneously, and finally passing thesame between rolls or under a hammer for the welding.

In testimony whereof we affix our signatures in the presence of two witnesses.

THOMAS SMITH. FRANK Gr. SHERRY.

Witnesses:

JOHN NOLAND, H. C. EVERT. 

